Willem Andriessen (Haarlem, October 25, 1887 – Amsterdam, March 29, 1964) was a Dutch pianist and composer. His compositional output was small due to the demands of performance and teaching, but he was nonetheless awarded a number of compositional prizes in Belgium and the Netherlands. He was an uncle of Louis Andriessen and Jurriaan Andriessen, who followed in his footsteps as composers.